Ignition coil



.Sept. 14 1926.

W. G. SCHNEIDER IGNITION COIL Filedoct, 16, 1924 2, Sheets-Sheet 1 Sept. 14 1926.

W. G. SCHNEIDER IGNITION Con,

Filed Oct. 16. 1924 2 Shoots-Sheet 2 |I Illlll Ill Patented Sept; 14, 1926.

UNITED STATES 1,599,842 PATENT OFFICE.

WILLIAM e; scn'nanma, or ANDERSON, INDIANA, assrenoa 'ro (manner. MOTORS CORPORATION, A CORPORATION OF DELAWARE.

IGNITION COIL.

Application filed mm 10, 1924. Serial No. 743,941.

Fig. 1 is a plan view of a coilembodying the present invention, the top cover of the coil case beingremoved;

Fig. 2 is a sectional view on the line 22 of Fig. 1; p a 7 Figs. 3 and 4 are; Ian and edge views, respectively, of one o the clamping members for maintaining the core in position;

Fig. 5 is a side view of the coil resistance unit;

6-6 of Fig. 5;

' Figs. 7 and 8 are sideviews core laminations;

Fi s. 9 and 10 are views similar to Fi of the coil 1 an 2 showing a modified form of t e inventi0n;-

Fig. 11 is a lan view of the nrodified form of lamination shown in Figs. 9 and 10; Fi 12 isa plan view of the spacing mem r in the air gap of the magnetic circuit shown in Fig. 10; and

Figs. 13 and 14 are plan and side views, respectively, of one of the clamping members which secure. certain core lammationsb in osition shown in Figs. 9 and 10.

' he form of inventionshown in Figs. 1 to 10 will first be described. The. ignition coil housing includes a non-conducting tube 20, a base 21 and a cover 22. The coil core 7 comprises a bundle of laminations of two different shapes shown at 23 in Fig. 7 and 24 in Fig. 8. These laminations are out without waste from flat sheet metal. Each rectangle a, b, c and d-of sheet metal forms two laminations 23 and each rectan 1e e, f, g and h of sheet metal forms two aminations 24. The lamigations 23 anedi i4 alile clam to ther an arc support y t e base i by enus of two clamping bolts 25, each provided with a nut 26 and cooperating. with a clamping plate 27 shown =m detail in Figs. 3 and 4. Plate 27 s provided Fig. "6 is a sectional view onthe line.

I non-conducting s withholes 28 for receiving the bolts rand with a flange 29 adapted to engage the ends of the 'laminations' 24. Plate 27 includes a portion 30 located centrally of the coil tube 20 and provided with a tapped hole 31 for receiving a screw 32 by means of which the cover 22 is secured to the housing tube 20. The primary windings 35 and the secondary windings 36 are assembled upon a non-conducting tube 37 and this coil winding assembly is placed around the branches 23 of laminations23 before the laminations 24 are assembled. As shown in Fig. 2 the tube 37 is cut away at 38 to receive the lamina tions 24.

One end 40 of the primary 35 is connected with a terminal 41 for receiving a wire leading to the ignition timer. The other end 42 of the primary 35 and the lead 43 from the, inside turn of the secondary 36 is connected with one of therivets 44 which secures to the tube 20 a bracket 45 which is threadedly engaged by screw 46 for attaching to the bracket 45 a sleeve 47 Sleeve 47 unites in a unit of a metal shield 48, a l 49, a metal terminal and an insulating washer 51. The spool 49 carries a resistance wire52, one end of which is attached to the metal shield 48 and the other to the terminal 50, therefore the-circuit from the rivet 44 to the terminal 50 includes a serew46, shield 48 and resistance wire 52. The terminal 50 is tapped to receive a screw for attaching to the terminal 50 a wire leading to the ignition switch and thento the battery which is usually ground- "ed in the automobile ignition system.

yThe lead from the outside turn of the secondary 36. is'attached to a hollow rivet 61 which secures to the housing tube 20 a non-conducting sleeve 62- rovided with a metal lining 63 which is a apted to receive an insulated flexible conductor provided with a terminal clip gages the member 63.

' The form of invention shown in FigS.' 9 to 14, inclusive, provides space withinthe coil housing for a condenser having one foil connected b wires 71 with the rimary terminal 41 and having the other oil connected by wire 72 with aclip 73 b means of which the condenser is ground as will be shown hereinafter. In this form of inwhich telescopically enyention thecore lamination: 23 are reversed,

no I

windings and the shorter branch 23 extending along the outside of the windings. The magnetic circuit is completed by laminations 74: which are cut from sheet metal. As indicated in Fig. 12 the rectangles is, I, m and n provide two laminations 74,'hence there is no waste in material. The air gap between laminations 74 and 23 is spacedby nonmagnetizable spacers 75 shown in Fig. 12.

The laminations 74 and 23 are clamped together and are secured to the base 21 by clamping means which includes a single bolt 76, which divides the laminations as shown in Fig. 9. Bolt 76 extends through an opening 77 in-clamping bracket 78 and receives a nut 79 by which the laminations are clamped between the bracket 78 and the base 21. Bracket 78 is provided with ears 80 extending adjacent the outside laminations 74: and prevents spreading of these laminations from the bolts 76. The primary and secondary windings 35 and 36 differ in construction from the windings 35 and 36 in that these windings are cylindrical in contour instead of somewhat rectangular and are mounted upon a cylindrical tube 37* instead of a rectangular one as shown in Fig. 1.

The connections'of the terminals of coils 35 and 36 are the same as shown in Fig. l

' with the exception that the lead o0 from the outside turn of the secondary 36 is connected with a hollow rivet 61 which secures to the coil case 20 a metallic button 82 provided with a groove 83 for receiving the terminal clip attached to a flexible insulated conductor. It is customary in automobile ignition systems to ground the battery and the ignition coil. Consequently in the form of the invention shown in Figs. 9 and 10 the condenser 7 0 will be grounded through connections including the terminal clip 73, bolts 76 and base 21.

I claim:

1. An ignition coil comprising, in combination, coil windings, a laminated core including a bundle of U-shaped laminae extending through and alongside the windings and a bundle of L-shaped' laminae extending across one end of the windings and meeting 1 the branches of the U-shaped laminae, and means for clamping the laminae together and to the base, the L-shaped laminae abutting one branch of the U-shaped laminae.

2. An ignition coil comprising, in com- 7 bination, coil windings, a core supporting the windings, a coil housing including a tubewindings and a portion extending longitudinally thereto, and a bolt extending exteriorly of the windings and parallel thereto, said bolt cooperating with the base with the transverse portion of said clamping member to attach the core to the base, and cooperating with the longitudinally extending portion to bundle together certain of the core laminations.

In testimony whereof I hereto aflix my signature.

WM. G. SCHNEIDER. 

